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Table 1 Summary of fuel load, weather conditions, and measurements of heat during prescribed burns conducted in native shortgrass steppe at the Central Plains Experimental Range in northeastern Colorado. Each row represents the mean of 3 or 4 burns conducted on the same day. TC = thermocouple, RH = relative humidity.

From: Characteristics of Burns Conducted under Modified Prescriptions to Mitigate Limited Fuels in a Semi-Arid Grassland

Year Season Fuel load (kg ha−1) Air temp (°C) Mean wind speed (m sec−1) RH (%) Scale Mean peak temp. (°C) Max. peak temp. (°C) Mean sec >60 °C Min. sec >60 °C Max. sec >60 °C Mean heat dose60 (°C sec)a Mean heat dose0 (°C sec)b Min. heat dose0 (°C sec) Max. heat dose0 (°C sec) TCs (n) TCs burned (%)
2007 Fall 698 20.2 7.8 6.9 16 ha 160.2 202.8 61 32 84 2 943 6 573 2 651 9 488 18 100
2008 Spring 499 11.1 3.8 12.0 400 m2 125.6 175.4 62 10 115 2 202 5 922 723 10 666 24 100
2008 Fall 549 11.0 10.8 33.6 16 ha 114.1 206.7 33 0 67 1 440 3427 0 8 844 18 83
2008 Fall 4 600 19.7 3.3 24.0 400 m2 108.7 157.3 65 33 124 1 732 5 602 2 022 11 379 24 100
2009 Spring 420 18.9 5.2 8.8 400 m2 126.3 168.4 55 29 105 2 083 5 396 2 005 9 591 24 100
2009 Spring 530 18.5 5.1 8.5 400 m2 147.8 195.1 65 41 89 3 149 7 039 3 599 12 105 24 100
2009 Fall 1 175 10.8 2.7 13.7 16 ha 158.4 210.7 98 58 145 4 489 10 396 5 162 16 092 18 100
2009 Fall 967 18.6 2.7 12.5 400 m2 169.5 207.7 78 29 101 4 273 8 934 2 047 11 607 24 100
2009 Fall 949 17.9 3.4 12.3 400 m2 170.7 215.6 106 51 152 5 720 12 054 4 018 20 565 24 100
2010 Spring 909 16.9 2.5 10.0 400 m2 135.6 193.9 57 0 80 2 594 6 037 0 10 804 24 96
2010 Fall 911 22.6 1.9 26.7 16 ha 143.6 261.1 154 103 209 8 640 17 865 12 064 25 049 18 100
2010 Fall 775 25.1 3.4 19.4 400 m2 159.9 193.2 68 34 94 3 738 7 803 3 019 12 238 24 100
2011 Spring 900 19.3 1.4 20.2 400 m2 168.4 208.9 62 29 92 3 713 7 425 3 348 11 253 24 100
2011 Fall 351 17.8 5.1 9.8 400 m2 107.1 144.3 32 0 52 925 2 828 0 5 579 24 83
2012 Spring 378 18.3 4.4 14.8 400 m2 115.4 136.0 45 0 58 1 603 4 316 0 5 885 24 96
2012 Spring 702 18.8 4.2 14.3 400 m2 186.7 264.7 82 55 105 5 483 10 383 5 440 16 399 24 100
2012 Fall 176 16.3 3.0 26.8 400 m2 60.3 89.5 13 0 64 173 970 0 5 315 24 42
2012 Fall 219 16.7 2.9 27.5 400 m2 76.8 125.2 29 0 121 796 2 543 0 15 639 24 58
2013 Spring 97 19.2 3.7 11.5 400 m2 61.5 85.8 25 0 105 254 1 759 0 7 013 24 54
  1. a Calculation comparable to Vermiere and Roth (2011) and Strong et al. (2013).
  2. b Calculation comparable to McDaniel et al. (1997, 2000).